Can apistogramma live with black skirt tetras?

Verdict
Yes

Yes, apistogramma and black skirt tetras can live together. Both are fine at 75–80°F. Plan on at least 20 gal.

ApistogrammaApistogramma75–84°F · pH 5–7 Black skirt tetraBlack skirt tetra70–80°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–80°Apistogramma 75–84°Black skirt tetra 70–80°
The green band is the temperature range both can live in.
456789Both: 6–7Apistogramma 5–7Black skirt tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Apistogramma · 3 inBlack skirt tetra · 2.5 in0"1"2"3"4"5"6"
Adult length in an aquarium. A fish can swallow anything that fits in its mouth, roughly a third to half its own length for predators.

Care at a glance

ApistogrammaBlack skirt tetra
Temperature75–84 °F70–80 °F
pH5–76–7.5
Adult size3.0 in2.5 in
Minimum tank20 gal15 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atBottomMiddle
GroupAlone or in pairsGroups of 6+
DietCarnivoreOmnivore

Better tank mates for apistogramma

All apistogramma tank mates

Better tank mates for black skirt tetras

All black skirt tetra tank mates

Questions

Can apistogramma live with black skirt tetras?

Yes, apistogramma and black skirt tetras can live together. Both are fine at 75–80°F. Plan on at least 20 gal.

What temperature suits both apistogramma and black skirt tetras?

75–80 °F. Apistogramma need 75–84 °F, black skirt tetras need 70–80 °F.

What size tank do apistogramma and black skirt tetras need together?

At least 20 gal, set by the apistogramma. Add space for each extra fish.